[PATCH] winhttp/tests: Fix more test failures.

[Marvin]

Hi,

While running your changed tests, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?

Full results can be found at:
https://testbot.winehq.org/JobDetails.pl?Key=57351

Your paranoid android.


=== build (build log) ===

Task errors:
The previous 1 run(s) terminated abnormally

=== w7pro64 (task log) ===

Task errors:
channel 2: open failed: connect failed: No route to host
channel 2: open failed: connect failed: No route to host
BotError: The test VM is powered off! Did the test shut it down?